According to the Text,the Most Realistic Method of Measuring the Divorce

According to the text,the most realistic method of measuring the divorce rate is to

A) count the number of divorces per thousand marriages in a given year.
B) divide the number of divorces in a year by the number of existing marriages.
C) compare the number of marriages in a given year to the number of divorces in the same year.
D) All of the above methods produce the same results.